this post was submitted on 22 Jun 2023
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NASA has a paper on how to not poop for days. It's on the Internet. Before space toilets there was only a space bag with finger scissor/scoop holes. It didn't work, poop got everywhere. The paper goes into detail about fecal matter being everywhere after early multi-day missions.
So they figured it out. Their system works -- I've also had my own reasons.
Do you remember anything about the title of this paper? I could not find it
Sorry, I can't find the specific paper-- NASA wrote so much about this (it was a big problem, plus astronauts had to save their poop-- which was then analyzed and copiously written about) that I just got lost looking. Search for "NASA low residue diet" and things like "preflight", "fecal collection assembly", "waste management system", and etc -- from Gemeni through Apollo.
There's pictures online of the bags. They were taped to the butts to help make a seal.
Now I want to read the preflight diet study again, so please write if you find it.